package ch03.demo.proxy;

import ch03.demo.service.Buyer;
import org.apache.log4j.Logger;

public class IntermediaryImpl implements Buyer {
    private Logger logger=Logger.getLogger(IntermediaryImpl.class);

    /**
     * 被代理的目标对象，即其内部含有对真实主题的引用
     */
    private Buyer target;   //里氏替换原则:子类可以替换父类，出现父类能够出现的任务

    public IntermediaryImpl(Buyer target){
        this.target=target;
    }
    @Override
    public String havealook() {
        before();
        String feedback= target.havealook();
        after();
        return "看房记录:买家反馈“"+feedback+"”";
    }
    public void before(){
        logger.debug("前期准备");
        logger.debug("查找房源");
        logger.debug("和卖家沟通时间");
    }
    public void after(){
        logger.debug("后期跟踪");
        logger.debug("和买家沟通意见");
    }
}
